CALGARY – Nexen Energy says it will spend about $400 million to build a 26,000-barrel-per-day expansion of its Long Lake oilsands project in northern Alberta.

The company, which was purchased by Chinese state-owned China National Offshore Oil Co. Ltd. (CNOOC) in 2013, says its Long Lake Southwest expansion will add three steam-driven well-pads that will send bitumen to its existing facilities.